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Prophetensee Quickborn

A cache by Carl Johnson Send Message to Owner Message this owner
Hidden : 8/2/2007
1 out of 5
1.5 out of 5

Size: Size: not chosen (not chosen)

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Geocache Description:


English description (German version below):

Sinkhole Earthquake and Salt Dome

A sinkhole, also known as a sink, shake hole, swallow hole, swallet, doline or cenote, is a natural depression or hole in the surface topography caused by the removal of soil or bedrock, often both, by water. Sinkholes may vary in size from less than a meter to several hundred meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. They may be formed gradually or suddenly, and are found worldwide.

If groundwater is in contact with the halite, another factor to be reckoned with is subrosion, i.e. cavities developing due to salt leaching. This could cause the roof to collapse, or sinkholes to form on the surface of the earth. There are numerous examples of this happening in salt domes all across northern Germany. They show up as small Lakes or Bog, in this case the "Quickborner Prophetensee".

The long Saltdome, reaching from Quickborn up to Hamburg-Othmarschen is 4 Kilometer in Diameter and under the Hospital of Hamburg-Altona it reaches up to 1 meter under the earth Surface.

Also the over 17 Kilometer far away "Bahrenfelder See" (N53 33.979 E9 53.914) in Hamburg is a sinkhole from the same Salt Dome.

Please perform the following tasks to log this earthcache:

1. What about northern Germany caused this sinkhole? Send the answer to me.

2. Approximately how many meters is the lake's circumference? Send the answer to me.

3. Take a picture with your GPS or yourself at (N53 43.454 E9 53.753) like you can see below under "Logbedingungen".

More Informations:

This idea, create an earthcache in this little nice town Quickborn, was inspired by the cache GC14T57 owner: m.zielinski. THX mate!

German Description:

Erdfall, Erdbeben und Salzstock

Als Doline (von slawisch dolina: Tal) oder Erdfall bezeichnet man eine schlot-, trichter- oder schüsselförmige Senke von meist rundem oder elliptischen Grundriss.

In Norddeutschland entstanden Erdfalltrichter über Salzstöcken, die zuvor durch Grundwasserablaugung (Subrosion) ausgehöhlt worden und eingestürzt waren. Oft entwickelten sich darin Seen oder Moore, wie in diesem Fall der Ouickborner Prophetensee.

Der langgezogene Salzstock, der von Quickborn bis nach Hamburg-Othmarschen reicht hat eine Breite von 4 Kilometern und reicht unter dem Altonaer Krankenhaus bis auf wenige Meter unter die Erdoberfläche heran.

Auch der über 17 Kilometer entfernte Bahrenfelder See in
Hamburg (N53 33.979 E9 53.914) ist ein Erdfall auf demselben Salzstock.

Um diesen Earthcache zu loggen mache bitte folgendes:

1. Wo, bzw. worüber entstanden in Norddeutschland Erdfalltrichter?
Sende mir deine Antwort.

2. Wieviele Meter Umfang, nur ungefähr, hat der See?
Sende mir deine Antwort.

3. Mache ein Bild von deinem GPS oder dir selbst bei (N53 43.454 E9 53.753), etwa so wie es das Foto unten
unter "Logbedingungen" zeigt und poste es mit deinem Log.

Erdbeben in Hamburg
visit link

Die Idee zu diesem Cache, und dazu in dem netten Städtchen Quickborn einen Earthcache zu legen, kam durch den Cache GC14T57 owner: m.zielinski. Danke für die Genehmigung den Text  in ähnlicher, teils gleicher Form benutzen zu dürfen :-)


Viel Erfolg, CJ

Additional Hints (No hints available.)



647 Logged Visits

Found it 631     Write note 15     Publish Listing 1     

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Rendered From:Unknown
Coordinates are in the WGS84 datum

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